Electric-arc lamp



' (No Model.) 3 sheets-41mm; 1.

W. S. PENDLETON.

ELECTRIC ARC LAMP. No. 524,116. Patented Aug. 7, 1894.

ATTORN EY 3 Sheets-Sheet 2.

(No Model.)

W. s. PEND LETON.

ELECTRIC ARC LAMP.

Patented Aug. 7, 1894.

ATTOR N EY3.

(No Model.) 3 Sheets-Sheet 3.

W. s. PBNDLETON.

ELECTRIC ARC LAMP.

No. 524,116. r Patented Aug. 7,1894.

ZZZ

WITNESSES: INVENTOR ATTORN EYS.

UNITED STATES WILLIAM S.

PATENT OFFICE.

PENDLETON, OF 'NElV YORK, ASSIGNOR TO EDMUND D.

DAVIDSON, OF HUNTINGTON, NEW YORK.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 524,116, dated August'7, 1894.

Application filed March 6, 1894. Serial No. 502,561. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM S. PENDLE- TON, a citizen of the UnitedStates, residing at New York, county and State of New York, haveinvented certain new and useful Improvements in Electrio-Arc Lamps, ofwhich the following is a specification. 1

The subject matter claimed is hereinafter specified.

In the accompanying drawings, Figure l is a side elevation of myimproved lamp; Fig. 2, a similar view, from the opposite side, of theupper part of the lamp; Fig. 3, a horizontal section through the upperpart of the lamp on the line 3, 3, of Fig. 2; Fig. 4, a diagramillustrating the circuit connections.

. The frame is of usual construction,consisting of the top and bottomplates A A connected by posts A and the depending rods A A on which thecarriage of the upper carbon works. The coarse wire magnet B, forseparating the carbons to strike the arc, and the fine wire or highresistance feed magnet C, are suitably mounted upon and pendent from thetop plate A.

The armature B of the magnet B is attached to a rocking frame B pivotedon the bottom plate A ata, and the play of the armature and frame islimited by an adjustable screw stop pin 12 passing up through the bottomplate A. At the top of the arch shaped frame 13 is mounted a wheel Dhavng a peripheral groove or recess 01 in which 1s wound the cord orchain D (the end 'of which is of course attached to the wheel) thatsupports the movable carbon carriage E, traveling on the rods A A, andto which the end of the cord is attached by an insulating connection atd. A volute spring D having one end attached to the frame B and theother to the wheel D tends normally to wind up the carbon carriagesuspending cord and hold the carriage up. The wheel D has alsoaperipheral toothed or cogged flange D that gears with a pinion F faston a shaft F having its hearings in the rocking frame B below the wheelD, and carrying at one end a ratchet wheel G, and at the other a brakewheel H. When the magnet B is energized and attracts its armature thecarriage rises, rocking on its pivot a, the carbon carriage E is raisedthus separating the carbon pencils and striking the arc, and the brakewheel H is pressed against the brake shoe H carried by a spring Hmounted on a post 11 on the frame plate A, and having an adjusting screwit for regulating the pressure of the shoe. At the same time the ratchetwheel G is by the same movement brought into engagement with a springpressed pawl G pivoted on a rocking frame C to which is attached thearmature C of the shunt or feed magnet (J. The frame C is also archshaped and passes over the shaft F in the franieB and is pivoted to thelower frame plate A at c. The armature O and frame 0 are drawn normallyaway from the magnet O by a spring 0 connected at one end to thearmature and at the other to an adj usting screw 0 passing upwardlythrough the plate A, the play of the frame being limited by a suitablestop. It, then, the current and circuit condition are such that themagnet C attracts its armature the frame (3 rises and the pawl G slipsover one or more teeth of the ratchet wheel G, according to theadjustment, andwhen the circuit through the shunt magnet C isinterrupted, as presently described, the armature and frame 0 are drawndown by the spring 0 and the pawl G drives .the ratchet wheel G which inturn, through pinion F drives the wheel D and lowers the carbon carriageto maintain the are between the carbon pencils.

To provide for the automatic opening of the shunt circuit through themagnet C after it has attracted its armature, I place on the frame'C orarmature O aprojection J carrying an adjustable screw J, and mount onthe frame plate A a post carrying an adjustable contact J and betweenthese two adjustable parts lies a contact spring fingerj carried by saidarmature or frame. The time when during the attraction of the armatureO, the fingerj leaves the contact J 2 and interrupts the circuit throughthe magnet C may be adjusted with nicety.

The carbon carriage E is provided withguideseofanysuitableordinarycharacter that run on the rods A A and maybe of any ordinary construction. In order, however, to provide anadjustment of the upper carbon pencil X toinsure its proper adjustmentwith the lower pencil Y, in trimming the lamp, 1 construct the carbon asfollows: A spherical socket is formed in the cross-piece of theframehalf in the cross-piece and half in a piece E hinged thereto at eand secured at the other end by a screw bolt 0 The carbon holder 7 has aball formed on the end which tits in the spherical socket. in this waythe carbon holder may be properly adjusted and clamped.

Z indicates the controlling switch of the lamp. It may be located, asshown, on the bottom plate A, or be placed at any point in the circuit.Suitable insulation is provided as required and as shown.

Referring more especially to the diagram Fig. at, the switch Z beingclosed, the main circuit is from the binding post L through the lowresistance magnet 13, thence to the upper carbon, lower carbon, and byinsulated wire V, passing up through the hollow red A to the bindingpost L, and thence to line again. The magnet B lifts its armature, thecarbons are separated, and the arc established as already described.When by reason of the consumption of the carbons and the consequentlengthening of the arc, the re sistance through the arc becomessufficiently great, the circuit through the sensitive high resistancefeed magnet C takes enough cur- .ent to energize it sufficiently tocause it to attract its armature, and the carbon carriage and carbon Xare fed downwardly to establish the normal condition of the arc.

The shunt circuit including the coils of the magnet C is asfollowsz-From the binding post L, through the contacts jJ coils ofmagnet C and separable contacts S S to the binding post L. hen themagnet 13 is de-energized, its armature remains down, as for instancewhen the switch Z is open, and the contacts S S are separated by thearmature, pressing S out of contact with S, and the circuit through thefeed magnet is therefore held open. When the carbon carriage in thenormal operation of the lamp has descended to its lowest position byreason of the gradual consumption of the carbons, a cut out contact Tthereon closes against an insulated contact T at the lower end of thelamp frame, which contact is connected as shown permanently through thecoils of the magnet G to contacts S S, to the binding posts L. In thiscondition of the lamp the armatures B O are permanently attracted andthe parts of the lamp remain motionless, but with a complete circuitthrough the lamp, so the current may still pass to one or more lampsthat may be in series therewith.

To provide for the adjustment of the pawl G, to compensate for wear andother conditiens, and afford adjustment of the play thereof, I providean eccentric hea d m on the rotatable bolt M, mounted in the upper endof the frame O This eccentric limits the movement of the' pawl under thetension of its spring.

In my organization the magnets are pendent from the top-plate and areremoved to that extent from the heat of the arc. The frame B of theseries magnet armature is composed (Fig. 3) of two arch shaped side barspivoted on one side to lugs on the bottom plate and bound together bythe armature B, and at the top by the shaft on which the combined gearwheel and winding drum is mounted centrally between the two side bars.The ratchet wheel G is carried at one end of the shaft F and the brakewheel at the other. The frame 13 an d all the parts carried thereby are,therefore, balanced and. symmetrically disposed with regard to thecentral plane of movement of the frame, and a COl't'GSpOlldlHfIcertainty and delicacyof operation results. The frame is similarlyconstructed, and all the working partsare practically included in thespace between the two pendent magnets. The construction is compact andsimple and is one that does not call for very great care in thefinishing and mounting of the parts. The coiled spring that tends towind up the wheel D is applied directly to the wheel and serves tosteady the feed and prevent too great a length of feed or throw of thepositive carbon.

I claim as my invention-- 1. The combination, substantially as setforth, of the magnet 13, the rocking frame actuated thereby, a wheelmounted in the frame and having a peripheral groove in which is woundthe suspending cord of the carbon carriage and a peripheral gear formedthereon, a spring applied to said wheel to wind. the cord thereon, apinion on a shaft mounted in said frame meshing with said peripheralgear, a ratchet wheel at one end of said shaft and a brake wheel at theother end of the shaft, a brake shoe against which the brake wheel ispressed when the carriage is actuated, the magnet 0, its rocking frame,the pawl on said frame into engagement with which the ratchet wheel isthrown by the movement of the first mentioned frame, and means forautomatically opening the circuit of the magnet 0 when the rocking framecarrying the pawl has been actuated by it.

2. The combination, substantially as set forth, of the top and bottomplates the mag nets 13, O, pendent from the top plate, the arch-shapedframes B pivoted upon the lower plate, and consisting of two side barsconnected by the armature of the magnet B,the arch shaped portion of theframe extending up between the magnets, the shaft uniting the upperparts of the two side bars, the peripherally geared or toothed windingwheel mounted centrally on said shaft and support ing the carboncarriage, the shaft I mounted in the lower part of the frame, andcarrying a pinion F with which the geared wheel meshes, a ratchet wheelon one end of the last named shaft, and a brake wheel upon the other,the arched shaped frame 0 pivoted on the bottom plate and consisting oftwo side bars connected with the armature of the mag net 0, said sidebars being arranged on the outer sides of the frame B and arching upover the shaft F, the pawl carried by the frame 0 and the brake shoemounted on the bottom plate.

3. The combination, substantially as set forth, of the top and bottomplates, the magnets B, O, pendent from the top plate, the archshapedrocking frame B actuated by the magnet B, and extending up between themagnets B, C, the carbon carriage suspending wheel mounted in saidframe, a gear moving with the wheel and driving a pinion on a shaftmounted in said frame, a ratchet wheel and brake wheel carried atopposite ends of said shaft, the rocking arch-shaped frame C actuated bythe magnet O, and extending up be: I tween the two magnets B, C, thepawl on the frame 0 engaging the ratchet wheel, the brake shoe, and thecontacts for automatically opening the circuits of the magnet 0 when ithas caused the movement of its rocking frame.

4. The combination, substantially as set forth, of the magnet B, therocking frame carried thereby, the carbon carriage suspending wheelmounted in said frame, a coil spring applied thereto and tendingnormally to raise the carriage, a gear moving with said wheel anddriving a pinion on a shaft mounted in the frame, a ratchet wheel and abrake wheel carried at opposite ends of said shaft, the frame C actuatedby the magnet O, the pawl on the frame engaging the ratchet wheel, thebrake shoe and the contacts for automatically opening the circuit of themagnet 0 when it has caused the movement of its frame.

5. The combination, substantially as set forth, of the magnet B includedin the main circuit with the carbons, the rocking frame controlled bysaid magnet, and from which is suspended the movable carbon carriage,whereby on the rocking of the carriage the carbons are separated toestablish the arc, the magnet 0 included in a shunt circuit around themagnet B, the separable contacts S S in said shunt, and opened by theframe of the magnet B when the .circuit through said magnet isinterrupted, the carbon feeding devices controlled by the magnet O, and

means for opening the shunt circuit including said magnet after itsarmature has been attracted.

6. The combination, substantially as set forth, with the magnet Bincluded with the carbons in the main circuit, means controlled therebyfor raising the carbon carriage to separate the carbons to establish thearc, the magnet O included in a shunt circuit, means controlled therebyto feed the carbon to maintain the normal condition of the arc, and acut-out contact adapted in the lowest position of the carbon carriage toclose against a cut-out contact permanently connected through the coilsof the magnet 0, whereby the armatures of both magnets are heldattracted, but with the mechanism of the lamp at rest with a completecircuit through the lamp.

7. The combination, substantially as set forth, of the magnet B includedin the main circuit with the carbons, the rocking frame controlled bysaid magnet and from which is suspended the movable carbon carriage,whereby on the rocking of the carriage the carbons are separated toestablish the arc, the magnet 0 included in the shunt circuit around themagnet B, the separable contacts S S in said shunt, means for openingsuch contacts when the magnet B is de-energized, the carbon feedingdevices controlled by the magnet C, and means for opening the shuntcircuit including said magnet after its armature has been attracted. I

In testimony whereof I have hereunto subscribed my name.

WILLIAM S. PENDLETON.

Witnesses:

FRANK S. OBER, ALFRED W. VAN ZEE.

